IDEGG? Ultra Lightweight Packable Backpack Hiking Daypack + Most Durable Light Backpacks for Men and Women / the Best Foldable Camping Outdoor Travel Biking School Air Travelling Carry on Backpacking (Dark green, 20L) Water-repellent and tear-resistant Nylon Material Open size:30*15*44CM (L*W*H); Folding size:16*16CM (L*H), Weight: 0.22kg, 7.8 ounce, Capacity: 20L Adjustable and breathable padded shoulder and chest strap to meet different requirements for both men and women In a foldable design, could be folded for easy collection when not use; Compact:Easy to folds up into small pocket. Unfolds from pocket to backpack.